Plumb Club Diamond Manufacturers | Certified Ethical Diamond Suppliers

Unlock access to The Plumb Club’s elite network of diamond manufacturers—trusted suppliers held to our Code of Responsibility and required to secure Responsible Jewellery Council certification. These industry-leading producers contribute to a sustainable, ethical supply chain while offering a wide array of diamond products—including lab-grown, fancy color, melee, rounds, and customized cuts—to meet diverse retail needs. Our user-friendly directory includes advanced search filters, enabling retailers and buyers to find the right diamond specialists based on product type, size, or application. Each listing reflects a committed standard of business integrity, legal compliance, human rights respect, and environmental responsibility—critical values in contemporary diamond sourcing. By partnering with Plumb Club diamond manufacturers, retailers reinforce their reputations, ensure consumer confidence, and support a more transparent and ethical jewelry industry.